Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue
Product and license	$ 147,257	$ 156,057	$ 218,908
Services and other	46,034	36,247	22,535
Total revenue	193,291	192,304	241,443
Cost of goods sold
Product and license	48,333	53,191	95,028
Services and other	10,444	8,456	2,875
Total cost of goods sold	58,777	61,647	97,903
Gross profit	134,514	130,657	143,540
Operating costs:
Sales and marketing	58,994	57,347	38,199
Research and development	23,119	23,214	17,457
General and administrative	37,400	31,648	32,489
Amortization of purchased intangible assets	8,809	8,849	4,942
Total operating costs	128,322	121,058	93,087
Operating income	6,192	9,599	50,453
Interest income, net	1,431	785	364
Other income (expense), net	758	993	38
Income from continuing operations before income taxes	8,381	11,377	50,855
Provision for income taxes	30,780	863	8,704
Net income (loss)	$ (22,399)	$ 10,514	$ 42,151
Net income (loss) per share
Basic (in dollars per share)	$ (0.56)	$ 0.27	$ 1.07
Diluted (in dollars per share)	$ (0.56)	$ 0.27	$ 1.06
Weighted average common shares outstanding:
Basic (in shares)	39,802	39,719	39,568
Diluted (in shares)	39,802	39,782	39,736